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Scaffold electrodes based on thioctic acid-capped gold nanoparticles coordinated Alcohol Dehydrogenase and Azure A films for high performance biosensor

AuthorsGómez-Anquela, C.; García-Mendiola, T.; Abad, José M.; Pita, Marcos ; Pariente, F.; Lorenzo, E.
KeywordsAlcohol dehydrogenase
Gold nanoparticles
Issue DateDec-2015
CitationBioelectrochemistry 106(part B): 335-342 (2015)
AbstractNanometric size gold nanoparticles capped with thiotic acid are used to coordinate with the Zn (II) present in the catalytic center of Alcohol Dehydrogenase (ADH). In combination with the NADH oxidation molecular catalyst Azure A, electrografted onto carbon screen-printed electrodes, they are used as scaffold electrodes for the construction of a very efficient ethanol biosensor. The final biosensing device exhibits a highly efficient ethanol oxidation with low overpotential of − 0.25 V besides a very good analytical performance with a detection limit of 0.14 ± 0.01 μM and a stable response for more than one month.
Publisher version (URL)https://doi.org/10.1016/j.bioelechem.2015.06.009
Appears in Collections:(ICP) Artículos
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